Strong Secrecy in Wireless Network Coding Systems with M-QAM Modulators
This work addresses confidentiality issues in wireless network coding for applications like secure communications, though it appears incremental as it builds on existing PNC and modulation techniques.
The paper tackles the problem of ensuring strong secrecy in wireless physical layer network coding (PNC) systems using standard QAM modulators, proposing a triple binning approach that enables secure data exchange without compromising throughput.
We investigate the possibility of developing physical layer network coding (PNC) schemes with embedded strong secrecy based on standard QAM modulators. The proposed scheme employs a triple binning approach at the QAM front-end of the wireless PNC encoders. A constructive example of a strong secrecy encoder is presented when a BPSK and an 8-PAM modulator are employed at the wireless transmitters and generalized to arbitrary M-QAM modulators, assuming channel inversion is attainable at the first cycle of the transmission. Our preliminary investigations demonstrate the potential of using such techniques to increase the throughput while in parallel not compromise the confidentiality of the exchanged data.